Derrick.



PATENTED PEB. 7, 1905.

A. HOHMANN.

DBRRICK.

APPLIGATION FILED MAR. 1s, 1903,

2 SHEETS-SEET 2,

514 -vc nto@ WMI/www0 @l Hoz new Patented February 7, 1905.

UNITED STATES PATENT UEETCE.

ADAM HOHB'IANN, OF EW'ING, NEBRASKA.

DERRICK.

SPECIFICATION forming part of Letters Patent No. 782,133, dated February'7, 1905.

Application filed March 13, 1903. Serial No. 147,662.

To all whom it may concern.:

Be it known that I, ADAM HoHMANN, a citizen of the United States,residing at Ewing, in the county of Holt, State of Nebraska, haveinvented certain new and useful ,Improvements in Derricks; and I dohereby declare the following' to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to what are commonly known as hay-derricks,although the principles involved may be embodied in derricks for otherspecific uses, the object of the invention being' to provide a derrickwhich may be transported from place to place for use in the field orbarn and which may be operated either manually7 or by horse-power, theconstruction and arrangement of the parts being such that the load maybe easily and quickly engaged, raised, swung laterally in eitherdirection, and then disengaged either with or without lowering.

A further object of the invention is to provide a simple and efiicientarrangement of braces for preventing tilting of the derrick,

ln the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure l is a perspective view showing a dei-rick embodying' the presentinvention and equipped for operation by horsepower. Fig. 2 isaperspective view showingl the lower portion of the mast equipped withcranks for manual operation to manipulate the load. Fig. 3 isatransverse section through the derrick-mast and the upper attaching-boltof the crank mechanism and showing the removable connection of thelatter to the mast.

Referring now to the drawings, and more particularly to Fig'. 1 thereof,the present dcrrick includes a triangular base portion comprising sillssuitably connected at their ends, and at one corner of which base ismounted the stem 6 of a caster-wheel T. At the other corners of the baseare mounted supportingwheels 8. Attached to the corner of the base inadvance of the casterwheel isa clevis 9, providing means for attachmentof draft appliances by means of which the derrick may be drawn fromplace to place.

Secured upon two of the sills of the base is a transverse beam 10,having a bearing 11, in which is engaged the pin 12 at the lower end ofthe mast 13 of the derrick, said mast having its lower end engaged in ametallic socketpiece 14, from which said pin projects, this socket-piecein connection with the beam forminga turn-table for the foot of themast. Secured in the corners of the base between the sills of which thelatter is formed are the braces 15, which converge upwardly and areattached to a sleeve 16, which encirclcs the mast and lits the lattersutliciently close to prevent wabbling of the mast, while permitting ofeasy rotation thereof. Upon the upper ends of the braces, which aresuitably formed for the purpose, is secured an annular plate 1T, whichlikewise closely encircles the mast. Engaged in the mast at a pointbelow its upper extremity and above the plate 1T is an arm or boom 1S,from which extends a brace 19 downwardly to the mast. Mounted in theupper end of the mast is a pulley-wheel 20, and a second pullev-\\'l1eel is mounted in the outer end of the boom, and through the boomand mast and over these pulley-wheels is passed a cable which is takendownwardly along the mast and under an idler 21 and has a swingletree atits end, to which may be hitched a horse to raise the fork 23, to whichthe opposite end of the cable is attached. The cable passes through theannular plate 17 and through the sleeve 16, within the inclosure ofwhich latter the cable lies in a longitudinal groove Q1 in the mast andin which groove it is held by the guides 25 above and below the sleeve,so that wear of the cable against the sleeve is prevented. Attached tothe fork is the ordinary trip-line 25, by means of which the forkistripped. When the hoisting-cable is slacked between the draft-animalsand the base of the mast, the fork may be drawn downwardly by pulling onthe trip-line 25 should the weight of the fork be not sulficient tocause it to descend. By means of l this trip-rope also the boom of thederrick is swung laterally.

To prevent tilting of the derrick under some 1,

conditions, uprights 26 are provided and rest I with their lower endsupon the base-frame,

while their upper ends are connected, and from them is hung a pulley 27,these uprights having braces 28, which rest with their lower ends uponthe plates 17. The cable is then taken from the idler upwardly and overthe pulley 27and then outwardly for attachment of draft-animals. In thisarrangement the strain upon the pulley 27 serves to counteract the pullon thc outer end ofthe boom and tilting is prevented.

When it is desired to raise the load manually, a winding-drum 29 isemployed, said winding-drum being carried by a crank-shaft 30, havingcranks 3l at its ends, and which shaft is journaled in plates 31 and32.' The mast has transverse perforations 33, corresponding toperforations 34 in the side plates, and through these plates and themast may be engaged clamping-bolts 34, by means of which the plates maybe clamped to the mast in parallel relation, as shown in Fig. 2. Theupper clamping-bolt serves also to hold a pawl 35 in operative relationto a ratchet-wheel 36 on the crank-shaft. When the derrick is to beoperated manually,this winding-drumis attached to the mast as abovedescribed and the cranks are rotated to wind the cable thereon.

In practice modifications of the specific conf struction shown may bemade and any suitable materials and proportions may be used for thevarious parts without departing from the spirit of the invention.

What is claimed is- 1. A derrick comprising a base having a mastrotatably mounted thereon and provided with a boom, a sleeve encirclingthe mast, braces extending from the sleeve to the base, an annular platesecured upon the braces and encircling the mast, said mast being groovedlongitudinally within the inclosure of the sleeve and plate, pulleyscarried by the boom and mast, an idler at the base of the mast, l

and a cable passed over the pulleys, through the groove and around theidler and having a fork at its end beyond the boom.

2. A derrick comprising a base having a mast rotatably mounted thereonand provided with a boom, an annular plate encircling the mast, bracesextending from the plate to the base, upwardly-convergent uprightsresting upon the base and having a pulley at their upl per ends, bracesattached to the uprights and4 4resting upon the annular plate, an idlerat the base of the mast, pulleys carried by the mast and boomrespectively and a cable passed over the pulleys of the boom and mastand then downwardly around the idler and then upwardly and over thepulley of the uprights.

3. A derrick comprising a base having' a mast rotatably mounted thereonand provided with a boom, an annular plate encircling the mast, bracesextending Jfrom the plate to the base, upwardly-convergent uprightsresting upon the base and having a pulley at their upper ends, bracesattached to the uprights and resting upon the annular plate, an idler atthe base of the mast, pulleys carried by the mast and boom respectively,a winding drum mounted upon the mast and having operatingcranks, and acable having a fork at one end and having its opposite end passed overthe pulleys of the boom and derrick and then downwardly around the idlerfor subsequent attachment to the winding-drum or passage over the pulleyof the uprights.

4. A derrick comprising a base having a mast mounted thereon andprovided with a

